Hand Tap Tap Style Straight Flute (Hand) Tap Dimension Type Inch Tap Thread Size 1/4 In.-28 Tap Chamfer Bottoming Plug Taper Number of Flutes 4 Pitch Diameter Limit H3 Tap Material High Speed Steel Tap Finish Bright Tap Thread Type UNF Left Hand Thread Length 5/8 In. Shank Dia 0.255 In. Overall Length 2-1/2 In. Number of Pieces 1California proposition 65 warning